03 Lubricating Oil System

03 LUBRICATING .

OIL SYSTEM

WÄRTS WÄRTSILÄ ILÄ W50D W50DF F STANDARD ENGINE

1

© Wärtsilä Wärtsilä 27 Septe Septembe mberr 2007 2007 W50DF03V0 W50DF03V00BTM 0BTM01A 01A Rev. Rev. 01

03 LUBRICATING OIL SYSTEM

Lubricating Lubri cating oil oi l system s ystem arrangeme arrangement nt - Internal 

System components

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03 Turbocharger

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04 Crankcase breather

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05 Main lubricating oil pump pump

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09 Pressure control valve

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11 Oil sump

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Pipe connections

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201 Lubricating oil inlet (from lube oil filter)

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202 Lubricating oil outlet (from oil sump, DE, FE)

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203 Lubricating oil inlet inlet to lubricating oil oil pump

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204 Lubricating oil from from lubricating oil pump

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217 Lubricating oil to alternator bearing bearing

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219 Sample 701 Crankcase air air vent, A, B-bank

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717 Crankcase breather breather drain (to Hot-box), A, -B-bank

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A

Lubricating oil to upper upper parts of the engine, A, B-bank

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B

Lubricating oil to camshaft and intermediate gear

Fig. name: Principal scheme of internal lubricating oil system 2

© Wärtsilä Wärtsilä 27 Septe Septembe mberr 2007 2007 W50DF03V0 W50DF03V00BTM 0BTM01A 01A Rev. Rev. 01


Lubricating oil system on engine The arrangement on the engine consist of lubricating system at free end, storage sys tem, delivery system, lubricating oil control devices and oil condition monitoring systems. 

System components

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01 Lubricating oil system at free end

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02 Lubricating oil storage system

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03 Lubricating oil delivery system

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04 Running-in filter (for commissioning and maintenance)

Fig. name: Lubricating oil system on engine 3

© Wärtsilä 27 September 2007 W50DF03V00BTM01A Rev. 01


Lubricating oil system at free end 

System components

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01 Oil sump

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02 Pressure regulating valve

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03 Lubricating oil pump

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Pipe connections

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H Lubricating oil inlet

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D Lubricating oil outlet (from oil sump, DE,FE)

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B Lubricating oil inlet to lubricating oil pump

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G Oil from lubricating oil pump

Fig. name: Lubricating oil system at free end 4



Lubricating oil sump The oil sump (01) of the engine is a dry sump. After circulation, returned oil is collected in the sump underneath the cylinder block. It has drainage openings situated at the both ends to allow the oil to flow through into a separate system oil tank. The main function of the dry sump is to collect lubricating oil after circulation through the engine.

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System components

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01 Oil sump

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02 Hydraulic jack

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03 Delivery pipe

Fig. name: Lubricating oil sump 5



Hydraulic jack 

Components

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01 Cylinder

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02 Oil pipe

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03 Piston 04 Piston

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05 Piston

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06 Support ring

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07 O-ring

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Connections

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A Pressure connection, when lifting

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B Pressure connection, when lowering

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C Lubricating oil inlet

Fig. name: Hydraulic jack 6



Lubricating oil delivery system Lubricating oil piping is made in seamless carbon steel and seamless precision tubes in c arbon or stainless steel. Lubricating delivery piping can be divided into sub-systems as follows. 

System components

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01 Oil inlet at free end

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02 Oil piping for main moving parts

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03 Oil piping at driving end

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04 Oil piping for turbocharger 05 Oil piping for cylinder head

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06 Oil piping for injection pump, tappets and camshaft bearings

Fig. name: Lubricating oil delivery s ystem 7



Splash guards at free end Covers are designed to shield the connections and thus meet the SOLAS requirements (4).

Fig. name: Splash guards for lubricating oil pipes at free end 8




Fig. name: Splash guards for lubricating oil pipes at free end 9




Fig. name: Splash guards for lubricating oil pipes at turbocharger 10



Lubricating oil to main moving parts Oil flow in the engine is div ided to following lubricating oil c ircuits: 

Lubricating oil to main moving parts.

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Lubricating oil to camshaft bearings and gear wheels at driving end.

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Lubricating oil flow to governor and drive gear.

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Lubricating oil to valves, valve tappet mechanism and fuel nozzle cooling. Lubricating oil flow to gear wheels and built-on pumps at free end.

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Lubricating oil to turbocharger bearings.

Lubricating oil to main moving parts From driving end oil flows to distribution channel at the bottom of the oil sump (01). From distribution channel oil flows through hydraulic jack (02) to main bearings (03), through crankshaft (04), to connecting rod bearings (05), up through connecting rod (06) to gudgeon pin bearings (07) and further to piston skirts cooling space (08).

Fig. name: Lubricating oil flow from oil sump to piston 11



Lubricating oil to main moving parts Lubric ating oil flow in piston Part of the lubricating oil through connecting rod (01) flows out from piston skirt through the special nozzles (02) to cylinder liner, forming an oil film between piston and cylinder liner surfaces. From the cylinder liner oil is drained back to oil sump.

Fig. name: Lubricating oil flow in piston 12



Lubricating oil flow at driving end The oil circuit consists of lubricating oil pipes and oil channels for camshaft drive gears and intermediate gears. Part of the lubricating oil flow is branched for lubrication of the gear wheels by special lubricating oil nozzle pipes (03). The nozzle pipes include small nozzle holes where out coming lubricating oil jet lubricates the gear wheels. 

System components

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01 Cover for camshaft

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02 Cover for intermediate gear

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03 Lubricating nozzle for gear

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Pipe connections

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A Lubricating oil inlet to camshaft drive gear bearing B Lubricating oil inlet to intermediate gear bearing

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C Lubricating oil supply to governor drive and gears

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Fig. name: Lubricating oil flow at driving end 13



Oil flow to intermediate gear wheel bearing From lubricating oil piping oil flows through channels of cover to thrust bearing and further to intermediate gear. Through channels of intermediate gear oil flows to bearings and back to oil s ump. 

System components

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01 Bigger intermediate gear wheel 02 Smaller intermediate gear wheel

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03 Intermediate gear bearing

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04 Thrust bearing

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Connections

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A Oil flow to bearing

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B Oil drain to sump

Fig. name: Oil flow to intermediate gear wheel bearing 14



Oil flow to camshaft driving gear bearing From lubricating oil piping oil flows through channels of cover to bearing and camshaft end. Through channels oil flows back to oil sump. 

System components

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01 Camshaft driving gear wheel

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03 Camshaft driving gear bearing 04 Thrust bearing

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Pipe connections

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A Oil flow to bearing

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B Oil drain to sump

Fig. name: Oil flow to camshaft drive gear bearing 15



Oil flow to camshaft bearing From the aluminium profile of delivery line the l ubricating oil is branched for lubrication of the camshaft bearing, for injection pump, for lubrication of tappets and valve mechanism. Further on, oil is branched for cooling of t he injection valve. 

System components

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01 Camshaft bearing

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02 Lubricating delivery line in Hot-box

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Connections

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A Oil flow to camshaft bearings

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B Oil flow tappets

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C Oil flow to injection pump

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D Oil flow to cylinder head

Fig. name: Oil flow to camshaft bearing 16



Lubricating oil to governor drive and gear wheels The governor drive bearings and drive gears are lubricated by the engine internal lubricating oil system. The system consists of the suction oil pipe connected to the governor drive housing, oil pipes for the drive bearings and lubricating oil nozzle pipes for drive gears. Oil is supplied by special oil nozzle pipes from the oil circulating system to the drive gear wheels and bearings of governor drive. The nozzle pipes include small nozzle holes from where a forced lubricating oil jet lubricates the gear wheels. 

System components

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01 Lubricating oil nozzle for gears

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Connections

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C Lubricating oil inlet to governor drive

Fig. name: Lubricating oil flow t o governor drive and gear w heels 17



Lubricating oil to governor drive and gear wheels The oil from the engine internal lubricating oil system flows through internal channels of governor drive to bearings and drains to sump. Lubricating oil nozzles lubricate gear wheels. 

System components

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01 Lubricating oil nozzle for gears

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Connections

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A Oil flow to bearings

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B Oil drain to sump

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C Oil flow to nozzle

Fig. name: Lubricating oil flow to governor drive 18



Oil flow to valve tappets and injection tappet From the aluminium profile manifold in the Hot-box on the engine block the lubricating oil is led for tappets assembly through oil channels of engine block. Lubrication of injection pump is arranged via lubricating pipe connection. After circulation the oil then returns to the oil sump.

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Connections

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B Oil flow to injection tappets and valve tappets

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C Oil flow to injection pump push rod

Fig. name: Oil flow to valve tappets and injection tappet and pump 19



Oil flow to valve mechanism and injection valve The oil flows to the cylinder head through a connection on the side of the cylinder head. Inside of the cylinder head oil flows through bore. And then continues up through the internal channels in the rocker arms arrangement, through the yoke pins to the top of the valves. The oil flow for the injection valve cooling is arranged via oil pipe to the top of valve body where oil flows to the nozzle end and then returns to top of the cylinder head. The oil then is drained via the push rod covering pipe through the valve tappets assemblies and back to the oil sump. 

System components

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01 Push rod

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02 Rocker arm

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03 Yoke

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04 Valve rotator

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05 Valve and valve guide

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06 Injection valve

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Pipe connections

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B Oil flow to injection valve cooling

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D Oil inlet connection Fig. name: Oil flow to valve mechanism and injection valve

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Lubricating oil flow to gear wheels and built-on pumps at free end The system consists of the suction oil pipe from the oil inlet, oil pipes for the built-on pump bearings and gear wheels, and lubricating oil nozzle pipes. Oil is supplied by special oil nozzle pipes from the discharge side of the lubricating oil pump to the drive gear wheels of the crankshaft and built-on pumps. The nozzle pipes include small nozzle holes through which a forced lubricating oil jets feed the gear wheels. 

System components

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16 Lubricating nozzle for driving gear

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17 Lubricating oil inlet for LT-water pump

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18 Lubricating oil inlet for HT-water pump

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19 Control pressure from delivery piping

Fig. name: Lubricating oil pipes for gear wheels and built-on pumps 21



Lubricating oil to turbocharger bearings  

Pipe connections A Lubrication oil delivery

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B Lubricating oil to turbocharger C Lubricating oil outlet

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D Lubricating oil to pressure switch

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E Lubricating oil drain to sump

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Fig. name: Lubricating oil to turbocharger bearings 22



Lubricating oil pump The lubricating oil pump is a screw pump with three screw spindles, driving and two idler spindles. The pump is dimensioned for actual lubricating oil viscosity. The working parts of the pump are the three screw spindles, which rotate in the s urrounding casing. The liquid moves axially when the sc rews rotate and is forced hereby creating a pumping action. The pump has an built-in pressure relief valve, which functions as a safety valve for the pump. The pump lubrication is supplied by the pumped lubricating oil. The pressure relief valve is designed for the maximum lubricating oil flow of the pump. When the pressure exceeds the adjusted values on the pressure side, the valve cone lifts from the seat and the lubricating oil circulates into suction side of the pump casing. The opening pressure is adjusted by compressing the valve spring with the adjusting screw at the factory. Pressure control valve of lubricating oil sys tem is integrated into pump housing. Fig. name: Lubricating oil pump 23



Lubricating oil pump 

Components

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01 Set of spindles

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02 Adjusting screw

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03 Spring plate

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04 Valve spring

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05 Valve seat

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06 Valve cone

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07 Screw plug

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08 Sealing ring

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09 Gasket

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10 Gasket

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11 Screw plug

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12 Sealing ring

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15 Threaded pin

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Connections

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A Suction connection C Pressure connection

Fig. name: Lubricating oil pump 24



Pressure control valve The lubricating oil system is equipped with a pressure regulating valve to maintain the oil at a constant pressure to the engine lubrication oil feed pipe under variable conditions (pressure changes after feed pump, pressure drop changes in coolers and filters etc.). If, for some reason, the pressure should increase strongly in the pressure side, safety valve (03) will open and admits oil to pass to the regulating piston (02). This serves as a safety valve. 

Components

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01 Adjusting screw

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02 Pilot control piston

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03 Overload safety valve

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04 Main regulating piston

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05 Orifice

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06 Spring

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Connections

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D Pressure connection

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E Outlet connection

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F Control pressure

Fig. name: Pressure control valve 25



Drive gear for lubricating oil pump The lubricating oil pump is driven by drive gear wheel at the end of crankshaft, which rotates pump mechanism. Gear wheel of pump is mounted with clamping rings. Pump is positioned correctly into pump cover with flange of pump and fastened by screws. 

Components

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01 Gear wheel

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02 Driving gear wheel

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03 Clamping ring, outer

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04 Clamping ring, inner

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05 Screw

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08 Screw 09 Sealing ring

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Fig. name: Drive gear for lubricating oil pump 26



Running-in filter All engines are provided with full-flow filters. The filters are used only during running-in and at the first start-up of the installation. The oil flows through the filter insert and dirt particles are collected to filter insert. A safety valve is built into the middle of the lower end flange. This safety valve opens if the pressure rises too much and allows the oil to pass through. It is recommended to use running-in filters after certain maintenance operations, such as major engine repairs and oil system maintenance or repair. The filters are usually removed by the installation personnel. 

Components

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01 Filter cartridge

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02 Safety valve

Fig. name: Running-in filter 27



Crankcase ventilation s ystem There is always an amount of v aporized oil in the crankcase and it has to be ventilated out from the engine. Vaporized oil is led out by the ventilation pipe mounted on the engine block. Inside the ventilation pipe there is a valve plate where vaporized oil is condensed. Condensed oil drains back to the crankcase and the remaining "dry" vaporized oil continues further up the pipe and out from the engine. 

System components

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01 Valve plate

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02 Base for breather valve

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03 Oil lock for breather

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Pipe connections

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A 717 Crankcase breather drain

Fig. name: Crankcase ventilation system arrangement 28


03 Lubricating Oil System

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